Mixing vat



NOV. 24, 1931. J KUENEMANN 1,833,220

MIXING VAT Filed. April 9, 1928 3 Sheets-Sheet 1 INVENTORW JOHIY RKUENEMHNIV A TTORNEY Nov. 24, 1931. J. R. KUENEMANN 1,833,220

MIXING VAT Filed April 9, 1928 5 Sheets-Sheet 2 A INVENTOR. omv R. Kus/vsmnun I ATTORNEY Ndv. 24, 1931. J. R. KUENEMANN 1,833,220

' H MIXING ,VAT

Filed April 9, 1928 3 Sheets-Sheet 5 INAVENTOR. JOHN R. K uEn/Emn mv A TTORNEY i 1 The invention relates toa mixing vat par ticularly designed for the mechanical m x- Patented Nov. 24, 1931 r UNITED? STATES! mrxrive var I JOHN 12-. KUENEMANN, or AKLAND, oALIroRNIK, 'Assm'rroit ro iiouis sfi roni sfolt BERK Y, CALIFORNIA H "Application eieda rn 9,-192s..;seriar1-ro 2 8,424.; g

ing of. dry and powdery materials and; having extending therethrough' a vshaft :carrying mixing paddles. 7 f i A general object of: the invention is to provide in a vat of the class described improved. and. particularly eifeotive sealing tional view of a shaft bearing; struot urepfn g I d a means for the different openings thereof whereby theescape of dust therefrom during mixing maybe prevented. V

A more'speoific object of the invention is to provide a hinged lid for the vat in which the hinge means itself provides a dust tight ]0lI1t. M Another object of the invention is to provide a dust-tight seatforthe lid around the edge of the lid opening such that the weight of the lid is suflicientforproviding the necessary sealing contact of the lidvvith the seat/i H A further object of the invention is to provide a combined packing and bearing device for the paddle shaft; whichdevice is particularly effective in protecting its bearings from dust from the vat.

A still further object of the inventionisi to provide a simple and efficient. dust-proof outlet gate for the vat.

Yet anOther'ObJect of the invention is-Ito provide improved mixing paddles and'a 1 features of advantage, some ofwhiohywith mounting means therefor;

The inventionpossesses other objects and ing description of the preferred form of the invention Whichis illustrated in the drawings accompanying and forming part of the specification. It is toibeunderstood; however, that variationsin the showing'made' by the said drawings and description may be adopted Within the scope of the invene tion as set forth inthe claims.

Referring to said drawings,' 7 v Figurel is a plan view ofthe vat, por- 'tions of the structure being broken away.

line 2-411 Figure 1.

' Figure 2 is an enlarged viewtaken'on the Figure 3 is asectional viewof the structure taken on the line 3 3 in Figure 1. e

' Figure .6

'*..Fignee4 is tame saga V F g ..an. n arg dsse ti m v iewxq a paddle,f taken'on the line. 5+5 in- Figure 12* taken on thelinefig-filinliigure Figure Tisf-an' enlarged. and

the device.)

Figure 8 is aside seetimi a ofithe sh Wing-OfoFigl rE7.

1y n the lin 9+ and 10*10111 li gur f 7 of majorelements' of the structure; a: V

r As herewith particularly. illustrated,.} t

fe e of y inven on re inc pora ed in the structureof avatll preferably, though 5s 1s 1L gefl reema IXYIQW was 1 I .Fig res9; and 10 are views:t 7

not necessarily, formed of ,sheet metaliand having. a shaft, 12 carrying mixing paddles In the present embodiment, the-Wat; is inbthe axis oftheshaft l2 lyingjinthe axis of cunvaa ture of the bottom .16 whereby a i-complete 117D 13 extendingtherethro lgh andhtherefrom, l

stirring of' materialin the bottom ofthev'at may be insured. As shown, thesidesjwlil i the vat are'pla'ne-and extendintegrally up- Wardly from. the; side'edg'es of the bottom-"16 2:39 in flaring relationto -tejrminatei substantially 'in'the-planeof the top'edges18 of the ends I -14ij Support-for the va'tis providedbymeans of a suitable frame;,19 to ehd-membersQI-off "which thevat or by riveting. 7

ends l 4 iare secured byf bolts e A discharge O en ng 22 i provided ure bottoni'of the vat,said opening beingpr'efsure means are jprovided 'the oper 1;ing' 22',

.b bl'y disposedf centra1 1y gf bottom 96 @l which will hereinafter appear. 3 Q1 13 and as h resh wh'. su hi'ma 'e' mp i ls 1 f bodyme b 23.1QXQ 1: to and. below: he-ra 1 tt m aid r Peni g. and p oviding a p ge. 2 ..th r thrq gh fo i i r' i withz the epeningezg; t gate'memb r in th re n ofda plate;26 is slidably mountedQi-n'the I body for movement-transversely. of theLpIas-I .f so

closely fits-the o ening27 which it is re- Ircip rocable;v V

' The opening 27 it is no'ted,ertends com pletely'5throughLthe "body, anda combined stop and s'ealingmeans is provided therein for engagement by the inner end of the plate 26 whenthelattfil is, disposed forfclosing 'the passagef24. Accordingly," as.

shown, an opening 28 is provided through" the, body 23, said opening extending across t-he opening27t in the planethereofand be ing somewhat fwider 'tha Y -the ,iopening 12 7 transversely thereof; Preferably, and as crioss section to receive azstrip of suitable .packing 29"of like "crosssection," said pack ing being of a nature to seajl'tlie joint made i V 7 "siliently yield ng nature whereby :a-vdust {proof seal may; be "provided between it and therewith by the opposed vplate edged To 7 facilitate the production I "and assembly" of i the outlet gate now described; the'body'25, is here shown formed ofupper and lower sec- I utilized to' hold the body sections'31 andtionsBl and 32-iespective1y,-said sections being transversely separable in a hori'zontal plane extending generally centrally through the plate receiving opening 27. Bolts 33 are 32together, and said bolts'ale xt 'through' the vat bottom with 'the heads there- "of engaged; against the inner side of said =bottomwhereby';they'serve alsoto secure the gateflbiody tome yet; "It wi-ll'now be noted that the gate" described 'isfparticularly efi i cient preventing theescape of dustthere through [when it is 7 closed," operates in a 7' particularly-simple manner, =and-p'ermits an unrestricted j'fio'w of the mixed j materials fl m hfth e fe 24.; 1 e e open; 7'

' u Material 'to-be-mi-xed is arranged-to be :placed in the vat from the top thereof,"and "a' cover- 36 havi ngatjleast a 'p'artithereof disfiplaceable is accordingly provided for the vat. "OfbYlQl lSly; the cover 36 mustafiord a tight closurefor the' vat duringa mixing 0f-pow so :"dery elements tobe mixed, asdust from niany substances whichmight be mixed in thepres Tentfvat wouldube dangerous or injurious. 5. As shown, thecover 36 is formed 'with} fixed P Y and movable sections'37 and38;respectively,

i the section37'being secured atthetopjof the 'c vatto extend from a longitudinaledge 39 thereof over parts of the top edges 18. of the ivends l ttoall o f 'which edges-itg-issecured.

v The movable cover section, or lid, 38is hinged ialong their ere edgeof the vcover section 37 by means provide a'dust-tight oint be- "twee'nand along y the sections, and as 'shown,

such means comprises a strip fil lof ifiexib'le f i and dust-tight material j oininig-rhe cover secitions along ale-11 1 length of theirabutting edgesQ; In thismanner, a" sealed hingeis provided in anieiitremely' simple mannrgiit. beingnoted; fbOth leather and rubb rized satisfactory as materials of which the strip 41 may be made.

Special sealing means are'al soiprovided around those top edge portions arranged to be engaged by the lid-3,8, it being obviousthat' the metal-to-meta-l contact of no Tgre'atwidth which'wouldobtain if the lid 88 engagedthe 7 metal, edges of the vat would proyide very inefficient seali Accordingly, and as'sliown, thoseedg'e'portions of the vat which are ar ranged to underlie the lid 38 are formed to;

define ayplane slightly, below the plane of theavat-redgefl portions which underlie "the,

cover section 57, and a strip 420i? aresiliefit sealing material 1s secured along said lowered V fabric have been found to be particularly edge portion with its top edgelying'substan l i tially in saidl'a'st'planeg The material" of the: stripsl2 is preferablyiof a somewhatre+ the cover sectioni'38 wlienthe latter is sup tion 38 is rendered unnecessary.

- Preferably, the sealing-strip 42 adjustc orted tl1ere'on.- In. thisf1'nanner, the neces-. 'sary seal'is'provided and the lprovision of specia'liastening means for-the: cover seetoo ably mounted in its'position o'n -the Ivat walls,

posed between the walls and clamp plates are utiliz ed'to'se c'ure thezplatesiii in' posi- Q tion; such bolts extending through the vat walls with their heads inside and through perforations 46 in tlie plates. ,Tlie strip 4C2 "iskdisposed"abovethe"boltset: and thefplate perf -ratiOnsAG freely receive the bolts'where a, '1 bya' screwingiupl -of thenuts4=7 of thewbolts r I arranged to clamp thestrip .i2-indesired adjusted relationzto' thehinged lid38 I111" 1 V "tliisnianner, thestrip 42 1nayzbefadjusted to: 7 e

insure aproperly sealed relation,10f- ;the lid" '38 t o the vat-when the lid: is operatively"disia posed. Means arefprovidedfor supporting the lid 38when open'awhereby anundue'fflex ingiofthe hinge stripAELmay be avoided, and. as shown'such means comprisesa plate mem er l8 secured to'the back vat wall 17; andjf" r extending-upwardly I of the fixed cover. por- Preferably,

the bearings'Y The' vbofxjes; andfbearition" 37- i to provide a rest at-jits top edge for 'supporting'the lid'38. 12 J f and as, shown, the shaft 12' ex-- tends through openings ,49 of both end walls in T14 of thevatsand 'is .journalled in suitable bearings 51 mounted'on thewa lls whereby it 1 is entirely supported-by theivatt Since,-as o a 'hereinbefore mentioned, it is liighly' de sirable- 1 5 I that leakage" of dust from the vat be r vent-- 1 ed,-and since most'dusts are, abrasive and so 1 4 mustb'e kept out of theshaftbearin-gs,stuff I Q 4 .ingboxes 52-are providediorlthe shaftj'whe're I 'it emerges from the "vatuand-linwardljjofi1 t.

* 'ingsshoul'd iermbiyimncateindependen-,

and'both must bef'supported fr'om thevat mash ax au r-gnea relationfiAceorfdingfly,fand 'a's'shown, these'menibers'are -provided f 'in s'a single structure 153 for monnting on the "Vat end 'wallsf s'aid :struetur'e providing for the "operative independence 'of the hearing Land stuffing boxportionsthereof.

f -l liepfosent, preferred,combine'dipacking boxand bearing'structure 53, itwill now be ifote'ch'comjprises aJba'seniember 54; arranged o b 'i .as te iw l a t ere foration "49 thereof and is fprovided with a perforation 56 arranged to be disposed in reggistration' the "wall perforation 49. a The perforation 56 is arranged to closely'ireceive theshaft r12 ,therethrough, but 'doesno't provide a bearing '"for the shaft. Extending from the base 54 in axial alignment with the .1 perforation 56 thereof is a sleeve 57,.the bore of said sleeve being of somewhat greater diameter than that of the shaft 12 whereby an annular stufiing box cavity 58 is defined about the shaft for the reception of'suitable stuffing 59; An annular gland 61 is providedfor mounting on the shaft and for slidably'fitted engagement in the bore'of the sleeve 57 whereby the packing may be compressed between it 7 and the base portion at the perforation 56 thereof in a well understood manner. Ears 62 extend radially and oppositely'from the gland 61, and are provided with axial per-' forations 63 for the reception of bolts 64;

which the gland 61 is arranged to be" forced and held against the packing with the neces- I sary pressure. As shown, the bolts 64 lie out wardly of the sleeve 57 and extend through perforations provided in the base'53 and the underlying wall portion; Preferably,"the

510 cars 62 are horizontally disposed, soflthat if dust of the material being mixedinthe vat should e'scapethrough the stuffing it would fall freely from the stuffing box and so be kept out of the bearings, this feature being an im- @145 portant one in'the present device.

Extending axially: from and along the sleeve 57 at the top and bottom thereof are 7 posts 66, said posts being in diametrically opposed relation and extending somewhat be- 150 ond the free end of the gland. The posts 66, it is noted, provide a mounting forthe bearing 51 and preferably comprise integral parts of the structure ofthelbase 54. The

' bearing structure, it will now be noted, com- I prises a cylindrical casing 67 having provided at one end thereof a radially extending flange 68 for engagement againstthe ends ofthe posts 66, the bearing surfaces ofsaidflan'ge and posts being machined for seated, and

:150 preferably stepped, engagement with each other.' Preferably, V and as shown, central portions of the opposed surfaces ofthe flange 68 andiposts 66 are depressed whereby only radially inner and outer portionsof said sur 5 faces provide the bearing between these inembers. Bolts 69are providedforfsecuring --thecasingflange-68totheposts 66,'fandas"l1'ere shown such bolts extend longitudinally -through the posts; for "engagement through the base 54 and' wallfl' whereby they =-al"so "serve to provide the-primary means for secui E.

ling the structure to the 7 wall, Preferably,

'and as shown, the post portions intermediate the ends thereofjand inithe line of the bolts-T69? whereby the "enedi T A centrally perforated fWall'7 1 providesa closur e forthe 'outerend ofthe cavity of the casing 67, and a" bushing 7 2' is mounted inftheii "bore of said sleeve '2 adjacent; the endfwall 71 thereof, Preferably, and as shown, the bore of the bushing-F7 2 definesfan annular space about the shaft 12 in which fa set of roller bearings 73v is disposed. 'A circumferential fr.

Tgr'oove74cis" provided'in the-bore-of'the cas- A ing 67 opposite the bushing 72, said groove being connectedwith a moil cup 76 mounted on 'thecasing anjdthe bushing is provided I with a perforation? 7 opposite the g1foove-71= whereby oil lfrom'the'cup is arranged to be a r delivered toithe bearings73'.

;- Means "for preventing a leakagefofioil wardly alongfthe shaft "toward "theyat is 's'tructure,and as here shown such meanscomjpreferahlyprovided as part of the'bearing "prise-saicupshapedmenfiber 7'8 having 'its bot tom axially perforated to receive-the shaft theretlrroughand disposed inthe' hereof v thecasing 67;,With its bottom f towarjdijthef bearings 73; The inner end of "the member '78 is closed by m-eansc of an annular disc 79 the-posts '66 whereby a'definitepositionin'g of the member-'78 is effected, ""It iwillbeinotrd Y that'enough clearanceis provided between the be a ring structure new described and the complete axial removalfof the gland "61 from withinsaid sleeve to permita renewal'of'the stufii1ig '59-thereinwithout necessitatingthe V v 1;20 5 will be further noted that thepresent means y rofrconib'inin'g the'bearing 51 stufll'ngboxf; as part of a single unitary structurein;

removal "of the bearing structure -Andiit' 415. end ofthe stufling box sleeve 57 to permit a "sures proper centered relation of these yelements and produces a particularly compact? and efficient unit forthe purpose for which 1 it ha s been designed. :1

The paddles l3, 't

'll i now. emitted cooperating sections :86 aga apgea to e ounted on hut-set, her Shown .formedw ith:

are cut away from the outer sides oftheposts structure isf consi'derably' liglit v isle-are: preferably formed ith-plane forwand faces 89, ands'uch'faces-are preferably jangularly related; to the shaft axiswhere- :as' the shaft is rotated; material being ]miXed=W-ill he urged axially alongthe shaft 7 hin af direction #determined by the" disposal I ofjthe'bladefacesg89. In the present venic-bodiment, eightpaddles 13care arranged to" v be bolted together aboutthe shaft 12 Where- 1 ibyethe ubslm be ndep e t y o n ed n-the shaft, t paddle, blades 88; extending radially theree @sections @86 carrying the from asl inte'gral portions thereof. Theblades be: mounted ontheiishaft12 within the-vat cavity, with the four blades nearest to each end set to urge material from such end tof ward themiddle of thei a-t, beneath which the-discharge opening'22 is providedjiln,

this-manner, a stirring of the material While "openings having been found to appreciably 1 increase the rate and thoroughness of mix 1mg effected bythedeyice, Preferably and as; 'sho'wngithe openings 91- are smallest at; I their, inlet-fiends, and are -genera1ly;b1ade d g a'discharge passagein registration with saidopening and 1a uidewayextending ereth h a e y: of r id, Pa sa e, s id m e e ng' o m ini estions S m e t -th -P ane. gu de y gate wmernber frictionally and s'lidably engageable V i -s aid guidewayandadis osable thereinfto, close "said pass'age aresi ientjsealing: strip in said guideway arranged to, be engaged" by anend ofsaidfgatemember when inpaS-f Sage l s positio a d c qpera ns on c the sections,'of;;.said, member "for releasably securing said strip in operat iye position v in the guideway.

In testimony day April; 1928..

shap din outl'ine with their narrow ends it 7' ztowardfthe'shaft. h r l "lafItf'Will novybenoted thatthe, present d'e f r J .7 1v'icefis-particularly designedformixing y V powdered;materials having ingredientsthe' 7 1 v :dust'btWhi'chi injurious to, organicflor 'in- -Qi2'ganic m'atter, particular reference being cma'de -lto-ingredients of paints,"calcimines,

' z .insecticides,' .etcilc 'lhe'- presentv strueture, e through itsvariousjsealing features,-prevents V m .thezescape fof dust during-mixing and-s0 'presuentslwast'e and possible injurytoan oper I aterior thestructureiin which the apparatus islhoused, It is not intended, however, to

solimit the use oifthe apparatus as themix "ing-g-Qflliquids withother liquids or with.

closing positioni I I dry materials may be efl'ectedby use of the present apparatus without change in the es H sentialstructure thereof; I V

ghavinq adischarge opening at; the bottom f thereof, iacimeinberiproviding- 1 a 'diseharge passage in registrationwith said opening and aguidewayextending therethroughtrans-.. 7' Iv j ,versely' of s aidpassage, agatemember frictionally {and-fslidablyiengageahle in said i gu-idewag ifor; closing said passage-, and'a {1 resilient sealing member inf-said guideway V 1 arranged'toflbei engaged -by1an end of said I gat'e member Whenthe member is-l'ili passage' o e e was]; hasnaaaajat; my handat Oakland, Qali-fOrnia, .thisl3rd EUGE E:TKUENEMF A'N lN 

